#include <iostream>
#include <vector>
#include <string>

using namespace std;

int main(int argc, char const *argv[])
{
    // 容器类 ：动态数组，长度可变的数组
    vector <int> v1 = {100, 200, 300};
    vector <double> v2 = {3.12, 436.1, 61.65};
    vector <string> v3 = {"hello", "bye"};

    // 插入到末尾
    v1.push_back(561);
    int n1 = v1.at(0);
    return 0;
}
